// [z-paging]使用页面滚动时引入此mixin，用于监听和处理onPullDownRefresh等页面生命周期方法

const ZPagingMixin = {
	onPullDownRefresh() {
		if (this.isPagingRefNotFound()) {
			return;
		}
		this.$refs.paging.reload();
	},
	onPageScroll(e) {
		if (this.isPagingRefNotFound()) {
			return;
		}
		this.$refs.paging.updatePageScrollTop(e.scrollTop);
		if (e.scrollTop < 10) {
			this.$refs.paging.doChatRecordLoadMore();
		}
	},
	onReachBottom() {
		if (this.isPagingRefNotFound()) {
			return;
		}
		this.$refs.paging.doLoadMore();
	},
	methods: {
		isPagingRefNotFound() {
			return !this.$refs.paging || this.$refs.paging === undefined;
		}
	}
}

export default ZPagingMixin;
